03-02-2009, 08:35 PM
Hello,
I've just gotten an hp35s and a long list of programs to input. I've just hit a line and I can't find the input for it. I am required to enter ∑ x and later on ∑ y but I can't make out how. I can see ∑+ and ∑- but I can't edit out the + or -. Any guidance would be a godsend.
Cheers.